C9" Malfunction Of Suction Air Temperature Sensor System - Daikin SkyAir RZQ200 · 250C7Y1B Service Manual

Diagnosis by Remote Controller
4.12 "C9" Malfunction of Suction Air Temperature Sensor
System
C9
Remote
Controller
Display
Applicable All indoor unit models
Models
Method of Malfunction detection is carried out by temperature detected by suction air temperature sensor.
Malfunction
Detection
Malfunction When the suction air temperature sensor's thermistor becomes disconnected or shorted while
Decision the unit is running.
Conditions
Supposed
Causes
Troubleshooting
116
Failure of the sensor itself
Broken or disconnected wire
Failure of indoor unit PC board
Failure of connector contact
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Check contact of connector
Is it normal?
YES
Disconnect the sunction air
temperature thermistor (R1T)
from X16A on the indoor unit
PC board and measure the
resistance.
Is the
thermistor normal?
(See note)
YES
See Check No. 6 for "Thermistor temperature/Resistance characteristics".
NO
NO
SiBE26-701
Connect correctly.
Sunction air temperature
sensor replacement.
If contact is OK, replace
outdoor unit PC board.
Troubleshooting